1|Page
G2 PREP TEST EXAM QUESTIONS WITH
ANSWERS
What is the equivalent length of a NPS 2" Schedule 40, 90* threaded elbow -
correct -answer-5.17 Feet
Which is the most common cause of the flue gas spillage form the gas appliances -
correct -answer-Negative air pressure caused by mechanical system
A poorly insulated building could result in - correct -answer-Increased fuel
consumption
What is the minimum size of a combustion air opening from outdoors for an
appliance with a draft hood and having an input of 120,000 Btu/h installed in a
structure that has a continuous vapor barrier and has an equivalent leakage area
of 0.05m sq. at a differential pressure of 10 Pascals (Pa) and dimensions of
10x10x20 - correct -answer-10 square inches
When a baffle is required to prevent the direct entry of rain into an air supply
opening, by how much can the baffle reduce the required free area of the opening
- correct -answer-0%
,2|Page
Conduction is - correct -answer-The transfer of heat from particle to particle
A forced air furnace uses what type of heat transfer - correct -answer-Convective
The bypass or minimum burner flame on a direct acting modulating oven control -
correct -answer-Acts as low limiting safety
When can a moisture exhaust duct from a clothes dryer be screwed together -
correct -answer-Never
Pressure regulators must be located with the vents - correct -answer-At least 12"
above grade
A regulator vent pipe is - correct -answer-The same size as the regulator vent
outlet
, 3|Page
A natural gas service regulator appears to be incorrectly adjusted - correct -
answer-Contact the gas supplier
The gas meter test dial can be used for - correct -answer-Checking the input of the
appliance
HOw many cylinders whether empty of full, that are not in use, may be stored in a
building under construction - correct -answer-0
For appliances with the same input, the size of orifice used for a propane
appliance should be - correct -answer-Smaller than the orifice used for natural gas
A propane vaporizer shall not raise the pressure in a tank in excess of - correct -
answer-215 Psig
Which item is used as a regulators restricting element - correct -answer-The
regulator Valve
G2 PREP TEST EXAM QUESTIONS WITH
ANSWERS
What is the equivalent length of a NPS 2" Schedule 40, 90* threaded elbow -
correct -answer-5.17 Feet
Which is the most common cause of the flue gas spillage form the gas appliances -
correct -answer-Negative air pressure caused by mechanical system
A poorly insulated building could result in - correct -answer-Increased fuel
consumption
What is the minimum size of a combustion air opening from outdoors for an
appliance with a draft hood and having an input of 120,000 Btu/h installed in a
structure that has a continuous vapor barrier and has an equivalent leakage area
of 0.05m sq. at a differential pressure of 10 Pascals (Pa) and dimensions of
10x10x20 - correct -answer-10 square inches
When a baffle is required to prevent the direct entry of rain into an air supply
opening, by how much can the baffle reduce the required free area of the opening
- correct -answer-0%
,2|Page
Conduction is - correct -answer-The transfer of heat from particle to particle
A forced air furnace uses what type of heat transfer - correct -answer-Convective
The bypass or minimum burner flame on a direct acting modulating oven control -
correct -answer-Acts as low limiting safety
When can a moisture exhaust duct from a clothes dryer be screwed together -
correct -answer-Never
Pressure regulators must be located with the vents - correct -answer-At least 12"
above grade
A regulator vent pipe is - correct -answer-The same size as the regulator vent
outlet
, 3|Page
A natural gas service regulator appears to be incorrectly adjusted - correct -
answer-Contact the gas supplier
The gas meter test dial can be used for - correct -answer-Checking the input of the
appliance
HOw many cylinders whether empty of full, that are not in use, may be stored in a
building under construction - correct -answer-0
For appliances with the same input, the size of orifice used for a propane
appliance should be - correct -answer-Smaller than the orifice used for natural gas
A propane vaporizer shall not raise the pressure in a tank in excess of - correct -
answer-215 Psig
Which item is used as a regulators restricting element - correct -answer-The
regulator Valve
